TCNA TEST REPORT NUMBER:
TCNA-0492-20
PAGE: 2 OF 3
Test Results: Results of testing performed on sample “B” UV irradiation
Sample
Bacteria
Inoculum
cfu/ml
Test number
Percentage
Reduction UV
0.25 mW/cm2*
Percentage
Reduction UV
1 mW/cm2*
Percentage
Reduction Dark*
“B”
E. coli
106
Test 1
96.4%
100%
93.4%
Test 2
95.0%
100%
95.7%
Test 3
95.9%
100%
95.9%
S. aureus
106
Test 1
100%
100%
96.7%
Test 2
99.9%
100%
95.5%
Test 3
100%
100%
97.2%
* Reduction in bacteria calculated per the initial number of bacteria inoculated on the surface of the bacteria
Test Results: Results of testing performed on sample “B3” UV irradiation
Sample
Bacteria
Inoculum
cfu/ml
Test number
Percentage
Reduction UV
0.25 mW/cm2*
Percentage
Reduction UV
1 mW/cm2*
Percentage
Reduction Dark*
“B3”
E. coli
106
Test 1
90.8%
100%
92.8.4%
S. aureus
106
Test 1
99.1%
100%
94.9%
* Reduction in bacteria calculated per the initial number of bacteria inoculated on the surface of the bacteria
ISO 27447:2019 (E) - Test method for antibacterial activity of semiconducting photocatalytic
materials – E. coli and S. aureus - TCNA
TCNA TEST REPORT NUMBER:
TCNA-0492-20
PAGE: 3 OF 3
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10/15/2020
______________________ ___________________
Dr. Jyothi Rangineni
Research Scientist
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